Fuel consumption test method for HEVs (Part 2) - method for improving the test accuracy

摘要

Linear regression method that estimates fuel consumption without energy increase/decrease condition in rechargeable energy storage system is expected as a practical test method for hybrid vehicles. In this report, factor that degrades the test accuracy and procedure to keep test be nigh accuracy, are discussed. Cold start test has a tendency to lead more degraded resultant data than that in conventional hot condition. We propose a simple data processing procedure that can improve the accuracy of cold start test up to 95% of the one in conventional hot mode test.